mkdir and fopen not creating files

Im trying to create an advert template for users to place an advert, although I can get the validation to work, the rest does not work.

I think it is caused by the user variable being incorrect somewhere.

This is the edited coding;

PHP Code:

public function drinkadvert()
    {
    $this->load->library('session');
    $this->load->helper('url');
    $this->load->library('upload');
    $this->load->library('image_lib');
    $this->load->library('form_validation');

        $config = array(
        array('field' => 'dri', 'label' => 'Drink', 'rules' => 'required', 'errors' => array( 'required' => 'Provide%s')), //This works
        array('field' => 'drink', 'label' => 'Photo', 'rules' => 'callback_upload_drink')); //This works

        $this->form_validation->set_rules($config);

        if($this->form_validation->run() == FALSE) // Every box is complete

        {
        $this->load->view('affairs/drinkadvert');
        }
        else
        {

        $lcuser = $this->session->userdata('user_name');
        $ucuser = ucfirst("$lcuser");

        $drink = $this->input->post('dri');

        if(!is_dir("C:xampp/htdocs/application/controllers/Adverts/$ucuser/"))

            mkdir("C:xampp/htdocs/application/controllers/Adverts/$ucuser/",0777,true); //This does not create

        if(!is_dir("C:xampp/htdocs/application/controllers/Adverts/$ucuser/$drink"))

            mkdir("C:xampp/htdocs/application/controllers/Adverts/$ucuser/$drink",0777,true); //This does not create

        //Upload Photos

            $config1['upload_path'] = 'members/'.$lcuser.'/advertphotos/'.$drink;
            $config1['allowed_types'] = 'png|jpg|jpeg';

            $this->upload->initialize($config1);

            if($this->upload->do_upload("$drink"))

            {
            $drink = $this->upload->data();
            $drink = 'members/'.$lcuser.'/advertphotos/'.$drink['file_name']; //This does not upload
            }
        }
    }

public function upload_drink($str)
    {
    $allowed_mime_type_arr = array('image/png','image/jpg','image/jpeg');

    if(isset($_FILES['drink']['name']) && $_FILES['drink']['name']!="")
        {
            $mime = get_mime_by_extension($_FILES['drink']['name']);

        if(in_array($mime, $allowed_mime_type_arr))
            {
            return TRUE;
            }
            else
            {
            $this->form_validation->set_message('upload_drink', 'Upload in png/jpg/jpeg format');
            return FALSE;
            }
        }
        else
        {
        $this->form_validation->set_message('upload_drink', 'ProvideAtLeastOnePhoto');
        return FALSE;
        }
    }

public function create_advert()
    {

$create = fopen("C:xampp/htdocs/application/controllers/Adverts/$ucuser/$drink.php", "w"); //This does not create
$cr = "<?php .................

$create = fopen("C:xampp/htdocs/application/views/adverts/$lcuser/$drink.php", "w"); //This does not create
$cr = "<?php .................

        redirect('adverts/.$ucuser.$drink');
    } 


Ive used all the functions on other pages which work OK, and Ive checked the coding that works against the coding above but cant find anything wrong.

Can anybody tell me what is wrong.